TCM4400E Datasheet, PDF (17/64 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

TCM4400E
GSM/DCS BASEBAND AND VOICE A/D
AND D/A RF INTERFACE CIRCUIT
SLWS082A – JULY 1999 – REVISED MARCH 2000
voice downlink path (continued)
frequency response of the voiceband downlink path
PARAMETER
100 Hz
TEST CONDITIONS
150 Hz
200 Hz
300 Hz
Frequency response (Gain relative to
reference gain at 1 kHz)
1000 Hz
2000 Hz
3000 Hz
Reference point
3400 Hz
3600 Hz
3800 Hz
4000 Hz
> 4600 Hz
MIN TYP
–5.8
–3.6
–2.5
–3 –1.4
0
–1 –0.6
–1 –0.15
–3 –0.35
–9.0
–21.0
–32.0
–60.0
MAX
–5
–2
1
1
1
1
1
–6
–15
–28
UNIT
dB
psophometric SNR vs signal level of the voiceband downlink path
PARAMETER
TEST CONDITIONS
–45 dBm0
–40 dBm0
–30 dBm0
Signal level
–20 dBm0
–10 dBm0
–5 dBm0
0 dBm0
3 dBm0
Idle channel noise, 0 Hz –4 kHz
Crosstalk with the uplink path
MIN TYP MAX UNIT
25
30
40
42
dB
45
42
40
35
–71 dBm
–50 dB
gain characteristics of the voiceband downlink path
PARAMETER
Absolute gain error
Gain tracking error. Over the range 3 dBm0 to – 45 dBm0 at
1 kHz with reference –10 dBm0 PGA gain = 0dB. Volume
control = –12 dB
3 dBm0
0 dBm0
–5 dBm0
–10 dBm0
–20 dBm0
–30 dBm0
–40 dBm0
–45 dBm0
TEST CONDITIONS
at 0 dbm0 and 1 kHz
at –10 dbm0 and 1 kHz
Reference level
MIN
–1.8
–11.8
–0.25
–0.25
–0.25
–0.25
–0.25
–0.35
–0.50
TYP MAX UNIT
0 0.2
dB
–10 –9.8
0.25
0.25
0.25
0
dB
0.25
0.25
0.35
0.50
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